Question

A translucent white solid $\left(A\right)$ reacts with excess of chlorine to give a yellowish white powder $\left(B\right).$ $\left(B\right)$ reacts with organic compounds containing $-OH$ group converting them into chloro derivatives. $\left(B\right)$ on hydrolysis gives $\left(C\right)$ and is finally converted to phosphoric acid. $\left(A\right),\left(B\right)$ and $\left(C\right)$ are:

• A. $P_4,PC{l}_3$ and $H_{3}P{O}_4$
• B. $P_4,PC{l}_5$ and $H_{3}P{O}_3$
• C. $P_4,PC{l}_5$ and $POC{l}_3$
• D. $P_4,PC{l}_3$ and $POC{l}_3$

Answer 1

The correct option is C $P_4,PC{l}_5$ and $POC{l}_3$

$\underset{A}{P_4}+10C{l}_2\to \underset{B}{PC{l}_5}$

$C_2{H}_{5}OH+\underset{B}{PC{l}_5}\to C_2{H}_{5}Cl+POC{l}_3+HCl$

$\underset{B}{PC{l}_5}+H_{2}O\to \underset{C}{POC{l}_3}+2HCl$

$\underset{C}{POC{l}_3}+3H_{2}O\to H_{3}P{O}_4+3HCl$